CN109647203A - Modified plane row of channels nanofiltration membrane spinneret and preparation method - Google Patents
Modified plane row of channels nanofiltration membrane spinneret and preparation method Download PDFInfo
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- CN109647203A CN109647203A CN201811601843.1A CN201811601843A CN109647203A CN 109647203 A CN109647203 A CN 109647203A CN 201811601843 A CN201811601843 A CN 201811601843A CN 109647203 A CN109647203 A CN 109647203A
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- spinneret
- spinneret orifice
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/021—Manufacturing thereof
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- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to hollow-fibre membranes to be film-made field, and in particular to a kind of modified plane row of channels nanofiltration membrane spinneret and preparation method.A kind of modified plane row of channels nanofiltration membrane spinneret includes multiple spinneret units interconnected；The spinneret unit includes spinneret orifice and the spinneret orifice or more two sides are arranged in are provided with symmetrical arc-shaped spinneret orifice, passes through the straight transitions hole connection of setting between adjacent arc-shaped spinneret orifice.Design of the invention is improved since polymer expands in the preparation process of basement membrane, and under many factors comprehensive function such as radial drawing, cross-direction shrinkage, finally obtained parallel channels basement membrane and spinneret orifice deviate serious problem.With the nanofiltration film-strength height for the parallel channels basement membrane preparation that the present invention is formed, flux is big, and fracture of wire incidence is extremely low.
Description
Technical field
The invention belongs to hollow-fibre membranes to be film-made field, and in particular to a kind of modified plane row of channels nanofiltration membrane spinneret
And preparation method.
Background technique
In the basement membrane preparation process of hollow fiber nanofiltration membrane, since polymer expands, and in radial drawing, cross-direction shrinkage
Under equal many factors comprehensive function, finally obtained parallel channels basement membrane and spinneret orifice deviate during serious prepared by the basement membrane
Hollow fiber nanofiltration membrane is easy to happen fracture of wire, and easily-deformable during spinning, destroys surface compact desalination layer, reduces film properties.
Summary of the invention
The purpose of the present invention is to overcome the defects in the prior art, provides a kind of modified plane row of channels nanofiltration membrane spray
Filament plate and preparation method.
The present invention to achieve the above object, using following technical scheme:
A kind of modified plane row of channels nanofiltration membrane spinneret, including multiple spinneret units interconnected；The spray
Silk unit includes spinneret orifice and the spinneret orifice or more two sides are arranged in are provided with symmetrical arc-shaped spinneret orifice, adjacent
Pass through the straight transitions hole connection of setting between arc-shaped spinneret orifice.
Arc-shaped spinneret orifice and the round spinneret orifice are concentric circles；The arc-shaped spinneret orifice of the spinneret unit at both ends
Arc radius is greater than the arc radius of the arc-shaped spinneret orifice of intermediate spinneret unit.
The axial distance in the straight transitions hole of adjacent spinneret unit is 0.1-0.2mm；The radius of spinneret orifice is 0.25-
0.3mm, the radius of intermediate arc-shaped spinneret orifice are 0.45-0.5mm；The radius of both ends arc-shaped spinneret orifice is 0.55-0.6mm.
The invention also includes a kind of preparation methods of modified plane row of channels nanofiltration membrane, are led in parallel using the modified
Nanofiltration membrane spinneret in road spins basement membrane, and feed liquid discharge pressure is 0.03-0.1MPa, draft speed 16.5-24m/min, feed liquid
Solid content 15-35%, 55-85 DEG C of coagulation bath temperature；Obtain multichannel basement membrane.
Compared with prior art, the beneficial effects of the present invention are:
The present invention has carried out following optimization to spinneret: spinneret bore edges being changed to arc-shaped by linear type, are reduced in this way
Intermediate spinneret orifice wall thickness about 10-30%, and increase the straight transitions wall thickness about 10-20% of adjacent spinneret unit simultaneously, increase logical
Road spacing 30-50%, smooth corner, and increase the spinneret orifice 50-100% of spinneret.Design of the invention improves basement membrane
It is finally obtained since polymer expands in preparation process, and under many factors comprehensive function such as radial drawing, cross-direction shrinkage
Parallel channels basement membrane and spinneret orifice deviate serious problem.With the nanofiltration film-strength for the parallel channels basement membrane preparation that the present invention is formed
Height, flux is big, and fracture of wire incidence is extremely low.
Detailed description of the invention
Fig. 1 is the overall structure diagram of modified plane row of channels nanofiltration membrane spinneret of the present invention；
Fig. 2 is the overall structure diagram of spinneret in the prior art；
Fig. 3 is the SEM photograph for the nanofiltration membrane that spinneret obtains in the prior art；
Fig. 4 is the SEM photograph for the nanofiltration membrane that modified plane row of channels nanofiltration membrane of the present invention is obtained with spinneret.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing and most
The present invention is described in further detail for good embodiment.
Fig. 1 shows a kind of modified plane row of channels nanofiltration membrane spinneret, including multiple spinneret units interconnected；Institute
The spinneret unit stated includes spinneret orifice and the spinneret orifice or more two sides are arranged in are provided with symmetrical arc-shaped spinneret orifice
(1,2) are connected by the straight transitions hole 4 of setting between adjacent arc-shaped spinneret orifice.
Arc-shaped spinneret orifice and the round spinneret orifice 3 are concentric circles；The arc-shaped spinneret orifice 1 of the spinneret unit at both ends
Arc radius be greater than intermediate spinneret unit arc-shaped spinneret orifice 2 arc radius.
Embodiment 1: the axial distance in the straight transitions hole of adjacent spinneret unit is 0.1mm；The radius of spinneret orifice is
0.25mm, the radius of intermediate arc-shaped spinneret orifice are 0.45mm；The radius of both ends arc-shaped spinneret orifice is 0.55mm.Use implementation
1 modified spinneret of example spins basement membrane, and feed liquid discharge pressure is 0.03MPa, draft speed 16.5m/min, feed liquid solid content
15%, 55 DEG C of coagulation bath temperature；Obtain multichannel basement membrane.
Embodiment 2: the axial distance in the straight transitions hole of adjacent spinneret unit is 0.2mm；The radius of spinneret orifice is
0.3mm, the radius of intermediate arc-shaped spinneret orifice are 0.5mm；The radius of both ends arc-shaped spinneret orifice is 0.6mm.Use embodiment 2
Modified spinneret spins basement membrane, and feed liquid discharge pressure is 0.1MPa, draft speed 24m/min, feed liquid solid content 35%, solidification
85 DEG C of bath temperature；Obtain multichannel basement membrane.
Embodiment 3: the axial distance in the straight transitions hole of adjacent spinneret unit is 0.15mm；The radius of spinneret orifice is
0.28mm, the radius of intermediate arc-shaped spinneret orifice are 0.48mm；The radius of both ends arc-shaped spinneret orifice is 0.58mm.Use implementation
3 modified spinneret of example spins basement membrane, feed liquid discharge pressure 0.05MPa, draft speed 21.5m/min, feed liquid solid content 16%,
75 DEG C of coagulation bath temperature.After obtaining multichannel basement membrane, it is immersed in be measured in deionized water.
Comparative example 1: using single channel, (arc radius of the arc-shaped spinneret orifice 1 of the spinneret unit at both ends is equal to intermediate
The arc radius of the arc-shaped spinneret orifice 2 of spinneret unit) other are same as Example 3.
Comparative example 2: feed liquid discharge pressure 0.22MPa, draft speed 13.8m/min, feed liquid solid content 28% solidify bath temperature
55 DEG C of degree.After obtaining multichannel basement membrane, it is immersed in be measured in deionized water.Other are same as Example 3.
Comparative example 3: using the prior art multichannel (diameter of internal layer spinneret orifice be 0.6mm, outer layer spinneret orifice perpendicular to
Axial distance (width) is 0.3mm, and the distance between adjacent inner layer spinneret orifice is that 0.6mm prepares basement membrane.
Functional layer coating is carried out using the basement membrane that embodiment 1-3 and comparative example 1-3 are obtained, obtains embodiment 4-6；Comparison
Example 4-6；Aqueous phase solution: 2 parts of (not specified is mass parts) piperazines, 0.1 part of sodium hydroxide, 100 parts of deionized waters.It is organic
Phase solution: 0.1 part of pyromellitic trimethylsilyl chloride, 100 parts of n-hexanes.Interfacial polymerization process: basement membrane is immersed in 10s in A phase, high speed is empty
4min is swept in air-blowing.It is immersed in B phase after 40s again, using 80-100 DEG C of low speed hot wind processing 40s to get product, submergence
It is to be measured in deionized water.Fig. 3 shows the SEM photograph of the nanofiltration membrane of the preparation of comparative example 6.Fig. 4 shows the nanofiltration of the preparation of embodiment 6
The SEM photograph of film.
Multi-channel membrane breaking strength test method: 10.0cm multichannel film wire is taken to be surveyed in breaking strength tester
Examination records result in the following table 1.
Table 1
| Breaking strength, N | |
| Embodiment 1 | 52.7 |
| Embodiment 2 | 60.2 |
| Embodiment 3 | 54.1 |
| Comparative example 1 | 5.2 |
| Comparative example 2 | 39.6 |
| Comparative example 3 | 62.9 |
Multi-channel membrane separating property test method:
Test fluid: 2000mg/L magnesium sulfate (MgSO is used4) solution testing.
Operating parameter: it is tested using multi-channel membrane evaluation instrument, pressure 0.5MPa, 25 DEG C, pH=7.0, the rate of recovery
15%.
Calculation formula:
Rejection R=(CI-CO)/CI* 100%, wherein CIFor conductance of intaking, COTo be discharged conductance；
Flux F=V/ (A*T), wherein V is to produce water volume, and A is membrane area, and T is time of measuring.Table 2 is nanofiltration UF membrane
The performance table of comparisons
Table 2
| Flux (LMH) | MgSO4(%) | |
| Embodiment 4 | 38 | 96 |
| Embodiment 5 | 30 | 97 |
| Embodiment 6 | 35 | 95 |
| Comparative example 4 | 45 | 97 |
| Comparative example 5 | 17 | 95 |
| Comparative example 6 | 11 | 93 |
Conclusion: there is higher breaking strength, higher flux using the basement membrane that modified spinneret orifice spins.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (4)
1. a kind of modified plane row of channels nanofiltration membrane spinneret, which is characterized in that including multiple spinneret units interconnected；
The spinneret unit includes spinneret orifice and the spinneret orifice or more two sides are arranged in are provided with symmetrical arc-shaped spinneret
Hole passes through the straight transitions hole connection of setting between adjacent arc-shaped spinneret orifice.
2. modified plane row of channels nanofiltration membrane spinneret according to claim 1, which is characterized in that arc-shaped spinneret orifice
It is concentric circles with the round spinneret orifice；The arc radius of the arc-shaped spinneret orifice of the spinneret unit at both ends is greater than intermediate spray
The arc radius of the arc-shaped spinneret orifice of silk unit.
3. modified plane row of channels nanofiltration membrane spinneret according to claim 2, which is characterized in that adjacent spinneret unit
Straight transitions hole axial distance be 0.1-0.2mm；The radius of spinneret orifice is 0.25-0.3mm, intermediate arc-shaped spinneret orifice
Radius is 0.45-0.5mm；The radius of both ends arc-shaped spinneret orifice is 0.55-0.6mm.
4. a kind of preparation method of modified plane row of channels nanofiltration membrane, which is characterized in that using described in any one of claim 1-3
Modified plane row of channels nanofiltration membrane with spinneret spin basement membrane, feed liquid discharge pressure be 0.03-0.1MPa, draft speed
16.5-24m/min, feed liquid solid content 15-35%, 55-85 DEG C of coagulation bath temperature；Obtain multichannel basement membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601843.1A CN109647203B (en) | 2018-12-26 | 2018-12-26 | Improved spinneret plate for parallel channel nanofiltration membrane and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811601843.1A CN109647203B (en) | 2018-12-26 | 2018-12-26 | Improved spinneret plate for parallel channel nanofiltration membrane and preparation method |
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| Publication Number | Publication Date |
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| CN109647203A true CN109647203A (en) | 2019-04-19 |
| CN109647203B CN109647203B (en) | 2021-10-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177022A (en) * | 1996-12-26 | 1998-03-25 | 上海德全化纤设备厂 | Method for mfg. multiple hellow shaped spinning plate |
| CN201648583U (en) * | 2010-03-30 | 2010-11-24 | 常州纺兴精密机械有限公司 | Duplex hollow spinneret |
| CN106256933A (en) * | 2016-08-28 | 2016-12-28 | 义乌华鼎锦纶股份有限公司 | A kind of moisture absorbing and sweat releasing delustering fibre and preparation method thereof |
| CN107653501A (en) * | 2017-10-12 | 2018-02-02 | 天津膜天膜科技股份有限公司 | The spinneret of more endoporus runners and its application |
| CN108014645A (en) * | 2017-12-15 | 2018-05-11 | 天津膜天膜科技股份有限公司 | A kind of parallel channels film and its membrane module |
-
2018
- 2018-12-26 CN CN201811601843.1A patent/CN109647203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177022A (en) * | 1996-12-26 | 1998-03-25 | 上海德全化纤设备厂 | Method for mfg. multiple hellow shaped spinning plate |
| CN201648583U (en) * | 2010-03-30 | 2010-11-24 | 常州纺兴精密机械有限公司 | Duplex hollow spinneret |
| CN106256933A (en) * | 2016-08-28 | 2016-12-28 | 义乌华鼎锦纶股份有限公司 | A kind of moisture absorbing and sweat releasing delustering fibre and preparation method thereof |
| CN107653501A (en) * | 2017-10-12 | 2018-02-02 | 天津膜天膜科技股份有限公司 | The spinneret of more endoporus runners and its application |
| CN108014645A (en) * | 2017-12-15 | 2018-05-11 | 天津膜天膜科技股份有限公司 | A kind of parallel channels film and its membrane module |
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| CN109647203B (en) | 2021-10-26 |
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